Abstract: An apparatus for dispersing liquid flame retardant mixtures mounts in the bucket of mine scoop. The apparatus has a housing which is generally sized to fit within a mine scoop bucket while leaving space in the bucket for moving mine material. The housing has a reservoir within it for holding a fire prevention mixture. The mixture is a liquid mixture and the apparatus has a motor, pump, tubes, and nozzles for dispersing the fire prevention mixture. The apparatus accommodates a hydraulic cylinder for moving the mixture dispersing apparatus back and forth within the scoop bucket. Some embodiments of the apparatus have a front face with scraper blade elements that operate as a scraper blade similar to scraper blades in scoop buckets that do not have the apparatus in place.

Abstract: A motor drives a pump to provide fluid under pressure in a closed hydraulic circuit through a pilot valve to a change speed clutch valve and a directional valve of a multi-speed transmission for an electrically powered vehicle, such as a mine haulage vehicle. The multi-speed transmission is connected by an output shaft to the driven wheels of the vehicle. A braking force is applied to the driven wheels by a hydraulically operated service brake to effect routine stopping of the vehicle. Under emergency conditions an emergency brake applies a braking force to the driven wheels by operation of a panic bar positioned in the operator's compartment. A brake valve connected to the panic bar maintains a preselected fluid pressure in the hydraulic circuit of the emergency brake to retain the brake in a released position. The hydraulic circuit is interlocked through the pilot valve to the transmission clutch and direction valves.

Abstract: A motor drives a pump to provide fluid under pressure in a closed hydraulic circuit through a pilot valve to a change speed clutch valve and a directional valve of a multi-speed transmission for an electrically powered vehicle, such as a mine haulage vehicle. The multi-speed transmission is connected by an output shaft to the driven wheels of the vehicle. A braking force is applied to the driven wheels by a hydraulically operated service brake to effect routine stopping of the vehicle. Under emergency conditions an emergency brake applies a braking force to the driven wheels by operation of a panic bar positioned in the operator's compartment. A brake valve connected to the panic bar maintains a preselected fluid pressure in the hydraulic circuit of the emergency brake to retain the brake in a released position. The hydraulic circuit is interlocked through the pilot valve to the transmission clutch and direction valves.

Abstract: A brake mechanism is mounted on a vehicle and includes a housing having a slot for receiving a rotatable disc to be braked. The upper portion of the housing includes a chamber for receiving pressurized fluid from a source. A spring actuated piston is slidably and sealingly disposed within the chamber. A removable spring assembly is positioned forwardly of the actuating piston and exerts a preselected spring force thereon. When the fluid pressure acting against the piston is less than the spring force applied to the piston, the piston moves axially in the chamber and a rod portion thereof contacts a lever that is pivotally mounted to the housing. The lever pivots on the housing to axially displace a brake applicator piston that is movably positioned in the housing adjacent to the rotatable disc. A plurality of braking pads are secured to the end portion of the applicator piston and additional braking pads are secured to the brake housing opposite the disc.

Abstract: A brake mechanism is mounted on a vehicle and includes a housing having a slot for receiving a rotatable disc to be braked. The upper portion of the housing includes a chamber for receiving pressurized fluid from a source. A spring actuated piston is slidably and sealingly disposed within the chamber. A removable spring assembly is positioned forwardly of the actuating piston and exerts a preselected spring force thereon. When the fluid pressure acting against the piston is less than the spring force applied to the piston, the piston moves axially in the chamber and a rod portion thereof contacts a lever that is pivotally mounted to the housing. The lever pivots on the housing to axially displace a brake applicator piston that is movably positioned in the housing adjacent to the rotatable disc. A plurality of braking pads are secured to the end portion of the applicator piston and additional braking pads are secured to the brake housing opposite the disc.

Abstract: A motor drives a pump to provide fluid under pressure in a closed hydraulic circuit through a pilot valve to a change speed clutch valve and a directional valve of a multi-speed transmission for an electrically powered vehicle, such as a mine haulage vehicle. The multi-speed transmission is connected by an output shaft to the driven wheels of the vehicle. A braking force is applied to the driven wheels by a hydraulically operated service brake to effect routine stopping of the vehicle. Under emergency conditions an emergency brake applies a braking force to the driven wheels by operation of a panic bar positioned in the operator's compartment. A brake valve connected to the panic bar maintains a preselected fluid pressure in the hydraulic circuit of the emergency brake to retain the brake in a released position. The hydraulic circuit is interlocked through the pilot valve to the transmission clutch and direction valves.